According to the Fick principle the oxygen consumption rate

According to the Fick principle, the oxygen consumption rate of an organ is equal to the blood flow through the organ times the amount of oxygen extracted from the blood as it flows through the organ: Oxygen consumption rate = Blood flow (arterial oxygen content - venous oxygen content) Joan has a total body oxygen consumption rate of 250 mL/min. The oxygen content of blood in her aorta is 200 mL O_2/L blood, and the oxygen content of her pulmonary artery blood is 160 mL O_2/L blood. What is Joan\'s cardiac output? You are constructing working models of the heart for extra credit. Your first attempt failed because the cells separated from each other during beating. What structures did you omit, and why did this allow the heart to fall apart? You omitted the gap junctions in your second attempt. How would a real heart fail to function normally without gap junctions? The paragraph below is a summary of a news article describing a new research treatment. Briefly explain the physiological rational for this treatment. Why is the AV node destroyed in this procedure? Why must a pacemaker be implanted? \"A new treatment for atrial fibrillation due to an excessively rapid rate at the SA node involves a high-voltage electrical pulse administered to the AV node to destroy autorhythmic cells. A ventricular pacemaker is then implanted in the patient?

Solution

4). Cardiac output (CO) = Oxygen consumption (ml/min)/ (arterial oxygen concentration - venous oxygen concentration)

Given that,

Oxygen consumption is = 250 ml/min

Arterial oxygen concentration is = 200 mL O₂/L

Venous oxygen concentration is = 160 mL O₂/L

Thus, the cardiac output is = 250/ (200-160) = 250/40 = 6.25 L/min